Extension-sweep bit-brace.



C. D. HEDDEN.

EXTENSION SWEEP BIT BRACE.

APPLICATION FILED OCT. 2. 1917.

Patented May 21,1918.

- form of boring tools.

menace.

as rarnnr UFFWE.

cLAnnncn 11. Hawaii, on CORRAL, IDAHO.

EXTENSION-SWEEP BIT-BRAGE.

Specification of Letters Patent. Patented May 211, 191%..

Application filed October 2, 1917. Serial No. 194,380.

To all whom it may concern:

Be it known that I, CLARENCE D. HEDDEN, a citizen of the United States, and residing at Corral, in the county of Camas and State of Idaho, have invented certain new and useful Improvements in Extension-Sweep .position and Bit-Braces, off which the following is a specification.

This invention relates to boring tools, and it relates more particularly to an improved One of the objects of this invention is to provide a brace which is capable of having the arms shortened or lengthened; that is, adjusted to various lengths of swing.

Another object is to provide a device of this character which is as strong,'rigid and effective as a brace of unadjustable construction.

Another object is to provide a device of this kind which is so simple of construction that it may be manufactured and sold ata comparatively low cost.

Another object is to provide a device of this character which may be very quickly disassembled; that is, separated into several distinctive elements which may be packed into a comparatively small space in a tool chest or thelike.

Other objects and advantages may become apparent to personswho read the following detailed description in connection with the accompanying drawings in which:

Figure 1 is a side elevation view of the complete brace.

i Fig. 2 is an enlarged ffragmental sectional view, illustrating the internal construction of the upper joint wherein the adjustments are made.

Fig. 3 is an enlarged bottom plan view of a portion of the upper leverior arm.

Fig. 4 is a top plan view of the upperend of the middle lever or member, and is identhat; the parts are shown in their extended Fig. e is a detailed-view illustrating one Fig. 7 is aview similarto Fig. 6 except several views, the device consists generally of three sections or separable elements A, B and C. (See Fig. 1.) Theelements A and C are counterparts in all respects except that A is provided with the usual head or handle 10, While the element C may be provided with any ordinary or preferred type of chuck or tool holding element 11.

The element B is provided with the usual handle 12, which is rotatably mounted on a substantially U-shaped bar or crank element 13, the latter being provided at each end with a disk 14 having notches 15 and 16 formed in its periphery. There may be any convenient number of notches 15, and they may be either equi-spaced as substantially shown in Fig. 4, or they may be spaced otherwise, according to particular desires or requirements, and these notches, which will hereinafter be known as blind notches extend onlya part of the way through the respective disks 14, as clearly shownin Figs.

of the notches 16, and these notches extend entirely across the cylindrical faces of the respective disks 14, as clearly shown in Figs. 1 and 4. The disks 14 are each provided with a central bore 17 for receiving a pivotal element which will hereinafter be described.

'1 and 2; but I preferably provide but two As theupper and lowerconnections are identically the same,the description of one joint or connection will sufiice for both. The ends having the members 10, and 11 thereon will behereinafter known as the outer ends, and the oppositeends of the elements A and C will be known as theinner ends. Theinner end-portion of each element A and C is detailed more clearly in Fig. 3 in which 18 designates a broadened portion. A recess 22 is formed in the inner keepers and detents 25 such as aremore.

clearly shown 1n Flg, 8,, are mounted to slide respectively in the grooves 21, and

these sliding elements constitute, clamp the shoulders 24; so as to efl'ectually prevent relative movement of the members 20 and--25, except the longitudinal movement abovementioned. l

Within the recess 22 is seated an actuator or rotary disk or element 27 having a ,pair' of diametrically spaced recesses 28, so toprovide room and clearance for links'29, these linksbeing pivoted at 30 and "site the disks 27 and members 2'5 respectivel y, asclearly shown in, Figs. 6 and 7 The disks 27 are each'provided with a square or otherwise non-cylindrical, aperture 32 for the purpose which will hereinafter appear.

"'For the' purpose of operating the elemem s? and 27 so as-to efi'ect adjustmentof the-device, I provide a pair of handle-member's. or manipulative elements 38, each comprising a thu'm-bflpiece 34, a boss or shoulder 35,, a cylindrical or pivotal portion 37, (the latter being of smaller diameter than the iiornrer) and a noncylindricalirportion38'. the partsof the bars are assembled and theop'erative relation shown in Figs. 1 ,2 andTG', the non-cylindrical elementBB iss'ea-t'ed in the-non-cylindrical recess 32 of thedisk27, while the cylindrical portions 36" and 37' yare-f'ormed to rotate inthe apertures 23 and 17 respectively.- A pin 39' or other suitable means; may be employed, for securing, the ortion 3'8 in the aperture 32 of the 'disk- 25, and this revents the manipulative member 33'; rorn being accidental 1y displaced, while the several portionsotth'e manipulative member 33 oooperate with the members 25 and 29in preventing accidental movement ofthe elements; A313 and Cwith' relation to; one another. In order to client this eoo 'eeration, the membcrs25-are each-provided witha cletainingl-rflg 440 rev-retaining lug or keeper elemental and a notch or recess 2. The detaining lugs 40 normally engage with the notches 15 so' as to; prevent accidental rotation' withrelation to the disks I8 and arms 20', while the retainin'g l'ugs llengage with thefipl'a'i 'ie outer surface of the respective disks l4 and'prev'ent' axial movement of the disks with respect; to the pivot elements 36ian'd37. n 1

In adjusting the device, the manipulative lements 33 are rota-ted through a suit'al'ile are-for moving the members 25 from the position shewnyin Ifigsi 2 and 6 to theposition' show Fig.- 7. This-movement brings the} detaining po tions 41' in engagement with the'drsks- 14. It Will be seen therefore,

.thatthe. disks 14 may now be rotated about their. respectivev pivotal elements 37, and that in thus rotating the disks, the handle element 12 is adjusted with relation to the members 10 and 11, the amount of adjustment being determined by the notches 15 in which the detents 40 rest when the adjustment is etfe'c'ted;

In order to hold the members 25 in their operative position, I provide a spring 43, which ishere illustrated as a compression spring and which is seated between the inner end of the slot 21 and the side of the detaming m'e1nber 25. By holding one of the members 25 in-the notch 15, this member co'eperates with the disk 27 and the connected links 29 for holding the companion'member 25 in its notch 15.

Although I have described this embodiment of my invention in minute detaih'it is to be understood that-my invention is not limited to these-exact details of construction and arrangement of parts, but that I am entitled to make such changes that do not constitute adeparture from the inventive idea hereindis'elosed.

What I claim as my invention is:

1. In a bit brace comprisin relatively upper and lower arms, a han' le' member having crank portions at its ends terminating-in diskswlam p members slidably mounted on the arms and adapted toflengage the disks at opposite points and secure the handl'e' member in an adjusted position,- and operating means for the clamp members m'o'untedon the arms.

2. In a bit brace comprising relatively upper and lower arms, a handle member having crank portions at its end-s terminating in disks, clamp member's slidablymount ed onbth'e arms and adapted to engage the disks atopposite points, and secure the handle member in an adjusted position; operating members rotatably mounted onthearms and eng'aging the said disks centrally, and connecting means between the operating members and the, clamp members to ell'ect a sliding of the clamp n'ien'ibers and adapted to hold them in. clampingposition.-

3. In bit; brace comprising relatively up 'enand lower arms, a handle member Inni g crank portions at its ends ternlinating indisks, clamp members slidingl-y held on the arms and disposed on opposite sides of the disks, operating members rotatably mounted on the arms and engagingthe d isks" centrally, and link connections between the operatingmembers and the clamp memb'er' si 4; A bit brace comprising an upper lever and a lower lever each formed with a longitudi n'al substantially dovetailed slot, a" pair of keeper members mounted for sliding movement longitudinally of said slot', an intermediate member provided with a liendle andwithla notchedclisk at each end, each notched disk being pivotally connected to a respective one of said levers and disposed between the keeper members thereof, and means cooperative with said keeper members for retaining said intermediate member in difierent adjusted positions with relation to said levers.

5. A bit brace comprising an upper lever gitudinally in, a slot of one of said levers,.

an actuating member connected thereto for operatlng said keeper member, manlpulatlve members each plvotally connected to one of said levers and secured to said actuating member and being provided with a pivotal ing each end provided with a notched disk having a central bore therein for receivmg sa1d p1vota1 portion, each of said dISkS being connected to one of said levers by means of sa1d manipulat ve member and said keeper member, said keeper member being movable by means of said manipulative member and actuating member forcausing said keeper member tdengage selected notches of said disk.

In testimony whereof I'alfix my signature 1n presence of two witnesses. i

CLARENCE D. HEDDEN. Witnesses:

Guns. H. KINNEY, Mrs. W. H. DREN'IER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 01 Yatents,

Washington, D. G. 

